Requirements

PHP 5.3.3 or later.
It is recommended to use PHP 5.4.0 or later
to get access to the latest mysqlnd features.

The mysqlnd_uh user handler
plugin supports all PHP applications and all available PHP MySQL extensions
(mysqli,
mysql,
PDO_MYSQL).
The PHP MySQL extension must be configured to use
mysqlnd in order to be able
to use the mysqlnd_uh plugin for
mysqlnd.

The alpha versions makes use of some mysqli features.
You must enable mysqli to compile the plugin.
This requirement may be removed in the future. Note, that this requirement
does not restrict you to use the plugin only with mysqli.
You can use the plugin to monitor mysql, mysqli
and PDO_MYSQL.